A haiku is a poem with five syllables in the first line, seven syllables in the second and five syllables in the final line. I tweet haikus about all different kinds of economics-related concepts whenever I feel inspired.

Follow me on Twitter and you can read my #economicshaikus regularly. Here is the current list:

19/6: F-Test determines, whether asymmetric root in TAR and MTAR. #economicshaikus #timeseries #econometrics #exam #study #steepness #deepness

18/6: Testing for ‘deepness’: Define Heaviside function and separate series. #TAR #timeseries #economicshaikus #econometrics #exam #study

17/6: Structural breaks test: use dummies for trend or drift, check significance. #economicshaikus #econometrics #time #series #exam #study

17/6: KPSS is; only unit root test with, #stationary #null. #economicshaikus #econometrics #hypothesis #exam #study

11/6: Cholesky factors: one lower triangular, by upper transpose. #economicshaikus #matrix #math #micro #theory #study

7/6: Spread fixed costs over more; In #economies of #scale. (Per unit it’s cheaper!) #economicshaikus #producer #theory #micro

6/6: Risk aversion helps; in pricing insurance if: we know who is who! #actuarial #economicshaikus #arrow #pratt #adverse #selection

4/6: Youth #unemployment: no suprise- Spain is highest. 1 in 5 jobless. #economicshaikus @COdendahl http://blogs.ft.com/ftdata/2013/06/03/european-youth-unemployment-nowhere-near-25-per-cent/ … pic.twitter.com/tl8Ripn3o2

29/5: To get the total, integrate the marginal, with the quantity! #economicshaikus #micro #theory #teachecon #week12

28/5: For max #likelihood, find where most likely and log- get #parameters! #economicshaikus #econometrics #theory #optimisation #estimator

26/5: “Real” in David Hume’s: #classical #dichotomy, nominal not same. #variables #money #neutrality #economicshaikus

25/5: Interest rate change: In money neutrality, no long-run effect! #economicshaikus #monetary #policy #macro #theory #hume #classical #dichotomy

22/5: Collective action: no incentive to start things, first mover bears cost. #disadvantage #economicshaikus #climatechange #game #theory

22/5: If #subset is #dense, in a defined #metric space, #closure gives whole #set. #economicshaikus #realanalysis #theory

20/5: Use VAR to test for: Long-run relationships and; Short-run adjustments. #economicshaikus #timeseries #exam #study #theory

18/5: All the ways to test, for #concavity are just, giving me headaches! #economicshaikus #problemsets #micro #theory #curvature #sigh

18/5: Linear functions, manageable except when 4 variables! #economicshaikus #micro #theory #problemsets #brainfried #constrained #optimisation

15/5: Oz in deficit, unemployment set to rise, baby bonus gone! #budget2013 #highlights #economicshaikus #ausecon @ESSA_aus http://economicstudents.com/2013/05/2013-14-budget-thats-a-wrap/ …

13/5: #Budget out today! Media holding their breath, #election ready. #economicshaikus #auspol #ausecon #medianvoter #willitkeepjuliain #doubtful

12/5: Like Melbourne’s Yo-Chi, #premiums are the standard, in ice cream #econ! @weloveyochi #economicshaikus #micro http://m.bbc.co.uk/news/magazine-22447799 …

9/5: Growth doesn’t say all, what’s with inequality? Use GINI for that. #economicshaikus #labour #lastday #teachecon #ECC3710

8/5: Boycotts are pricey, but who needs insulin, right? Costs more than you think! @TimHarcourt #ausecon #economicshaikus http://m.theaustralian.com.au/national-affairs/opinion/itd-hurt-us-to-boycott-israel/story-e6frgd0x-1226636313836 …

7/5: Interest rates down. Victorian budget out. (News outside library!) #economicshaikus #theory #applications #reallife #econ #study #bubble

6/5: #Concave function is: positive definite in, #Hessian for all x. #micro #theory #economicshaikus #problemsets #cost #minimisation

4/5: Average the cost, divide total by unit. ( #Production #theory) #micro #economicshaikus #problemsets

2/5: Adjustment is slow, In smooth transition models (like real exchange rates). #economicshaikus #econometrics #timeseries #applied #trade

30/4: The leaky bucket: #distribution not costless. Poor get less than planned. #economicshaikus #micro #firstyear #ECC1000 #teachecon #welfare

30/4: Real analysis: sets are both open and closed, in discrete metric. #economicshaikus #problemsets #confusing #acceptance #getsbetterwithvodka

26/4: Only one buyer; In #monopsony #market, workers accept less. #economicshaikus #marketpower #scarcitydriveswagedown #pressureonprice #labour

24/4: Model differences? Run unrestricted and full: test coefficients. #economicshaikus #econometrics #fstat #fcrit #ftest

22/4: #Duality is: Maximum utility, Minimum spend–> same! #economicshaikus #micro #theory #Problemset #constrained #optimisation

18/4: #Discrete #metric #space: Singletons are open and; set apart by 1. #settheory #confusing #openandclosed #economicshaikus #maths #theory

17/4: Watch out, macro folks! Keynesians grin about debt. Lesson: learn Excel #economicshaikus #controversy #reinhartrogoff http://www.peri.umass.edu/fileadmin/pdf/working_papers/working_papers_301-350/WP322.pdf …

13/4: Let’s pay for #Gonski. #Libertarians mad too. Unis bear the cost. #economicshaikus #auspol #tradeoff #HECS #funding http://www.abc.net.au/news/2013-04-13/gonski/4627278 …

11/4: Hey actuaries. I’m teaching you tomorrow. Get ready for fun! #utility #theory #risk #tutorials #ecc1001 #economicshaikus

8/4: In Leontief, classic case: left shoe, right shoe. Perfect compliments. #economicshaikus #micro #theory #utility #function #example

7/4: Consistent MTAR: tests for asymmetric roots (different threshold). #economicshaikus #timeseries #steepness #econometrics

5/4: Trend stationary: remove the trend and we go! (Check residuals) #economicshaikus #timeseries #theory #lovestats

4/4: Fy non-zero: Implicit function exists. Unique solution. #micro #theory #economicshaikus #midsem #exam #study #goingcrazy #justkeepswimming

3/4: Total spend the same? Cournot aggregation if: price change and spend all! #micro #economicshaikus #theory #walraslaw #midsem #exam #study

31/3: Fisher Effect is: nominal less inflation gives real interest. #rate #economicshaikus #finance #macro

30/3: Sample size too small? “Micronumerosity”: #variance  bigger. #lovestats #economicshaikus #multicollinearity #goldbergerliveson

29/3: Perfect rent seeking: Land of opportunity? Only for a few. #inequality #USecon #economicshaikus Via @NewEconomics http://www.huffingtonpost.com/mobileweb/al-gore/income-inequality_b_2852471.html?utm_hp_ref=green …

28/3: ‪#Sets can be open, but definition is loose; so can be closed too! ‪#sigh ‪#economicshaikus ‪#maths ‪#stats ‪#settheory ‪#makeupyourmind

27/3: In ‪#Solow Model: Depreciation same as: investment -stable! ‪#economicshaikus ‪#macro ‪#theory ‪#solowswan ‪#outofsyllables ‪#sorryswan

26/3: Cross price effect is: Income plus substitution. (Slutsky equation!) ‪#economicshaikus ‪#micro ‪#theory

21/3: Consumption/leisure? Give up one for the other. Depends on wage rate. ‪#economicshaikus  ‪#substitutioneffect ‪#labour ‪#economics ‪#teachecon

21/3: Yet another coup. ALP mess; Abbot stoked. And nothing has changed! ‪#auspol ‪#economicshaikus ‪#election2013 ‪#rentseeking ‪#coupsworkforjulia

17/3: Trouble in ‪#Cyprus. Cue Twitter expectations: Will it prompt ‪#bank ‪#run? ‪#economicshaikus ‪#austerity via ‪@faisalislam ‪http://shar.es/edvk7 

16/3: High costs of ‪#fair-trade. Late salary but price floor. More like fair ‪#tradeoff. ‪#economicshaikus ‪#coffee ‪@nytimes ‪http://nyti.ms/15b6g7L 

13/3: As good as itself? Reflexive relationship. But can’t be own son. ‪#economicshaikus ‪#micro ‪#theory ‪#assumptions ‪#violation ‪#definerelationship

12/3: Upper contour set. Not just plain convexity. The “real” ‪#micro rules. ‪#economicshaikus ‪#consumer ‪#theory ‪#theyliedtoyouinundergrad ‪#quote

11/3: Got a unit root? Check with Dickey Fuller Test. Need to use Tau stat. ‪#economicshaikus ‪#lovestats ‪#timeseries ‪#13hoursofclass ‪#goinginsane

7/3: Commutative Law: Adding gives the same result. Not multiplying! ‪#matrices ‪#rules ‪#economicshaikus ‪@StatFact @Stats2Knowledge ‪#teachecon

6/3: Other ‪#mining ‪#boom. Creativity ‪#market. Follows its own rules. ‪#economicshaikus ‪#service ‪#economy RT ‪@ozpolicyonline ‪http://apo.org.au/commentary/mining-different-type-boom-growth-australia%E2%80%99s-creative-services?section=commentary …

6/3: #Auspol déjà vu! Another MP outed. What is going on? ‪#baillieu ‪#economicshaikus ‪#seriously ‪#getonwithit

6/3: ‪#Future ominous. New ‪#Econ to discover? We know: we don’t know. ‪#economicshaikus ‪#research ‪@victorricciardi  ‪http://www.social-europe.eu/2013/02/our-childrens-economics/ …”

5/3: In line for hot dog. There’s no such thing as free lunch. How long will you wait? ‪#teachecon ‪#1styear ‪#micro ‪#economicshaikus ‪#oweek ‪#promos

3/3: Want to get a job? Policy seems tedious. Anglicise your name. ‪#economicshaikus HT ‪@gabster0191 ‪http://fb.me/LFKtFCs3 

27/2: A smaller workforce. Higher nominal wages. Real wage will fall though. ‪#economicshaikus ‪#labour ‪@EconEconomics ‪http://flip.it/azNoi 

25/2: Forget brain, just drain. Mobility has high costs: origin suffers. ‪#economicshaikus ‪#EU ‪#question ‪@m_clem RT ‪@MargRev ‪http://flip.it/hP5or 

25/2: Talent-clustering. Does it affect the regions? apparently not. ‪#economicshaikus ‪#geography ‪@MattCowgill ‪@MelbUrbanist ‪http://flip.it/0sTuv 

24/2: Revealed ‪#preference: always choosing the same thing. The Weak Axiom… ‪#economicshaikus ‪#inferpreferences ‪#choice ‪#backtouni ‪#micro ‪#theory

19/2: Wage up, but what then? Inflation could rise with it. Will poverty fall? ‪#minimumwage ‪#economicshaikus @beckerposner ‪http://flip.it/sMALx 

18/2: Assumptions abound: It’s ‪#perfect ‪#competition. That’s why it all works. ‪#notinreallife ‪#economicshaikus

12/2: Bigger labour force: Wage down but growth overall. A classic tradeoff. ‪#economicshaikus ‪#labour ‪#economics ‪#excitedtoteach ‪#semester12013

11/2: Sunk costs can’t be real- because we get too attached. Assumptions don’t hold. ‪#economicshaikus ‪#microeconomics ‪#choicescience ‪#theoryfails

8/2: If supply too much, goods (people) are easy to get. –> Price (of date) goes down. ‪#economicshaikus ‪#genderbalance ‪#unevenbargaining ‪#dating

4/2: Free riders take all, and nobody likes bludgers! So tax everyone. ‪#economicshaikus ‪#ironic ‪#welfareeconomics ‪#publicgoodstheory

2/2: Learn from peers around; a ‘good’ ‪#externality. Subsidise research.‪#economicshaikus ‪#positive ‪#consumption ‪#hangoutwithme ‪#illteachyouecon

1/2: Something you don’t know? That’s ‪#asymmetric ‪#info: get ‪#incentives right. ‪#lemonmarket ‪#economicshaikus ‪#ignoranceisbliss

29/1: Flailing GDP. Under-represented girls. Solve these together. ‪#economicshaikus ‪#underutilised ‪#labourforce ‪@ABSStats ‪http://www.abs.gov.au/ausstats/abs@.nsf/Lookup/4125.0main+features1130Jan%202013 …

28/1: ‎‪#Incentives matter. What does your customer want? Especially with ‪#aid. ‪#economicshaikus ‪@ted_talks: Condoms in DRC ‪http://www.ted.com/talks/amy_lockwood_selling_condoms_in_the_congo.html …

26/1: Worth more than others? That’s ‪#price ‪#discrimination. Just standard ‪#econ. ‪#Economicshaikus ‪#airline ‪@nomadicmatt ‪http://flip.it/QH4oz 

25/1: Australia Day: multiculturalism, bbq’s and beer. ‪#economicshaikus ‪#notreallyaboutecon ‪#celebrate ‪#diversity ‪#thebestgainsfromtrade

24/1: Hey single ladies, get down to East Pilbara. 3 men for each gal! ‪#genderimbalance ‪#sexratio ‪#BITREintern ‪#economicshaikus

20/1: Rely on data, but intuition is key. We fail without it. ‪#economicshaikus ‪#warningsforeconometricians ‪#crazystats ‪http://blogs.hbr.org/fox/2012/10/why-data-will-never-replace-thinking.html …

20/1: Set theory kills me. Calculus is way better. Missing my Econ! ‪#economicshaikus ‪#study ‪#probabilitybasicsboreme ‪#ilikethingscomplicated

17/1: The world is ageing. Men die younger, more gals left.. Old, poor and lonely. ‪#crazystats ‪#marryyoungermen ‪#planyourfinances ‪#economicshaikus

14/1: Catch the Dutch Disease: while wages and prices rise, imports make us poor. ‪#economicshaikus ‪#intern ‪#labour ‪#economics ‪#regional ‪#BITRE

2013!

31/12: Fiscal cliff Test Match: Love public holiday sport! Round 2 tomorrow! ‪#economicshaikus

20/12: One day left on earth? Change your temporal focus–> Be more risk-loving. ‪#endoftheworldeconomics ‪#economicshaikus ‪#YOLO ‪#discardedtheories

16/12: “No ‪#inflation here.” Bad news for ‪#Argentina. Red card if there is!! ‪#economicshaikus ‪@themoneygame ‪@lopezlinette ‪http://flip.it/tetHL 

16/12: ‪#Climatechange models- predictions aren’t great. No one knows what’s next. ‪#economicshaikus ‪http://blogs.telegraph.co.uk/news/tomchiversscience/100194356/the-only-certainty-is-that-nothings-certain/?utm_medium=referral&utm_source=t.co …

10/12: PDF on top. It’s Inverse Mills Ratio! CDF below! ‪#economicshaikus ‪#econometrics ‪#paneldata lessons ‪http://www.buseco.monash.edu.au/ebs/events/2012/workshop-panel-hsiao.php …

10/12: Sample size rules all. Parametric estimates. Try other methods. ‪#economicshaikus ‪#paneldata ‪#econometrics lessons ‪http://www.buseco.monash.edu.au/ebs/events/2012/workshop-panel-hsiao.php …

9/10: ’13 will be tough, mining brings up GDP, unlikely next year. ‪#economicshaikus ‪#ausecon ‪http://finance.ninemsn.com.au/newsbusiness/aap/8575345/gdp-rose-0-5-in-the-sept-qtr …

3/12: Delay panicking- waiting on Republicans – there’s still time to dream! ‪#fiscalcliffbedtimestories ‪#economicshaikus ‪http://read.bi/Tw3Lrx 

21/11: Like my politics? New extreme matching theory. Vote with your partner?! ‪#economicshaikus ‪#ideaologymatching ‪#dating

‪http://washington.cbslocal.com/2012/11/20/the-bipartisan-couple-an-endangered-species/ …

21/11: Good news everyone! The ‪#miningboom isn’t over! Just changing, says Glenn. ‪#RBA ‪#economicshaikus ‪http://www.businessspectator.com.au/bs.nsf/Article/Mining-boom-evolving-not-ending-Stevens-pd20121121-28TUU?OpenDocument&src=hp3 …

19/11: The EU taxes. Protectionism runs rife. Such Mercantilists. ‪#economicshaikus ‪#airline ‪#climatechange ‪@ConversationEDU  ‪http://flpbd.it/FulZB 

8/11: Free learning is great. Good for human capital. but property rights? ‪#economicshaikus ‪#patentlaw ‪#opensource ‪@WorldBank ‪http://blogs.worldbank.org/edutech/mapping-oer …

1/1: Stunt men get paid lots–> Compensating ‪#wage for risk. I prefer teaching.. ‪#economicshaikus ‪#laboureconomics

28/10: Challenge for pollies. Spend less than revenue earned. Incentives not there.. ‪#economicshaikus ‪@1RossGittins ‪http://bit.ly/QOIREp  ‪#ausecon

22/10: Pay rate is lower.. Monopsony market here? Set minimum wage. ‪#laboureconomics ‪#economicshaikus ‪#taxi ‪#enquiry ‪#ACCC

18/10: Girls should ‪#volunteer. Will it reduce the wage gap? Apparently so! ‪#economicshaikus ‪#laboureconomics ‪http://economiclogic.blogspot.com.au/2012/10/why-women-should-volunteer.html …

17/10: All hail the great state! Trade surplus is key to ‪#wealth. Ah, ‪#mercantilists..! ‪#economicshaikus ‪#HOET ‪@_Economiqs_  ‪http://economiqs.com/article-en-142.html …”

14/10: What’s ‪#economics? No such thing as a free lunch–> Resources are scarce! ‪#economicshaikus ‪#teachingecon ‪#oportunitycost

10/10: Classical theory: price determined by labour–> Smith, Marx, Sraffa dream! ‪#economicshaikus ‪#historyofeconomicthought

9/10: Watch out ‪#RBA– bribery charges run rife. We need to trust you! ‪#economicshaikus ‪#macroeconomicstability http://www.afr.com/p/national/rba_stevens_admits_securency_failings_ugpCig1ETM8IKxVoZpbleJ …

9/10: We’ve lost a ‪#Slipper! Both sides of House up in arms! Free speech dies of shame.. #auspol ‪#economicshaikus ‪#destroythejoint ‪#titfortat

8/10: Earn different wage? Firms will hire cheapest labour.. Hire more females then!! ‪#economicshaikus ‪#laboureconomics ‪http://www.eowa.gov.au/Research%20and%20Resources/Stats_At_A_Glance_Jul_2012253.pdf …

1/10: Best way to help banks? ‪#Recapitalisation. (But Finland’s extreme!) ‪#Eurozone ‪#economicshaikus ‪http://buff.ly/QiAGzQ 

30/9: ‪#Rates likely to fall, but no one is borrowing. Watch out- stagnation!! ‪#economicshaikus ‪#RBA

27/9: #Woolworths: rates to fall. ‪#ABS: jobs rising too. No more ‪#recession? ‪#economicshaikus ‪#newstoday

20/9: Wage compensates risk. Unless too many skydivers. Then safe jobs pay more. ‪#economicshaikus ‪#laboureconomics

18/9: Romney makes faux pas. Still, irrational to vote.. “Yes We Can” again?? ‪#economicshaikus ‪#USelection

13/9: Aussie dollar up. The Fed wants interest down.. Bring on ‪#QE3!! ‪#economicshaikus

12/9: No choices is bad! But- diminishing returns! Too MUCH ‪#choice is bad! ‪#economicshaikus

10/9: Smith says ‘Divide work!’ Infra marginal does too- but costs get higher. ‪#economicshaikus ‪#inframarginaleconomics ‪#divisionoflabour

6/9: ‪#Ricardo, trade gun. Opposed Corn laws for wage rise. No one listened though. ‪#economicshaikus ‪#historyofeconomicthought

6/9: ‪#Malthus was depressed. You would be if expected death, as cure for hunger! ‪#economicshaikus ‪#historyofeconomicthought

6/9: Study ‪#statistics? Moment generating function: best shortcut you’ll learn! ‪#statisticshaikus ‪#lifeofaquant ‪#headachetheorems

5/9: Need austerity. Just what ‪#Hayek warned us of – History repeats.. ‪#economicshaikus @INETeconomics ‪@ProSyn ‪http://ow.ly/dspki 

5/9: #AtlasShrugged is great- if you’re an ‪#entrepreneur (not a ‪#Keynesian).  ‪#economicshaikus ‪#freemarketdebate http://bit.ly/RLDQdm 

5/9: ‪#Miningboom is over? Gina panicking… Say more stupid stuff! ‪#economicshaikus  “‪@azizonomics: Rinehart is a Bubble ‪http://wp.me/p1JI3a-1pm ”

5/9: #Poor will get poorer. Is it due to politics? Questions about  ‪#aid. ‪#economicshaikus  ‪#globalpoverty @EconEconomics ‪http://econ.st/RHwqYp 

5/9: South  ‪#Africa wins. The continent is flailing. Mauritius wins too. ‪#economicshaikus “‪@davos Africa’s economies ‪http://wef.ch/gcr  ‪#GCR”

5/9: Bernanke is wrong.  ‪#QE2 is not working, but let’s keep trying. ‪#economicshaikus “‪@EconomicsInfo: Why Berate Bernanke? ‪http://subdomainz.com/ful2 ”

4/9: #Patents can be great, but can harm consumers too. Where is the balance?  ‪#economicshaikus  ‪@TheEconomist ‪http://econ.st/OVOlxW 

4/9: Tourism is down. Where the bloody hell are ya? Perhaps Singapore.. ‪#economicshaikus ‪@macro_business  ‪http://ow.ly/1mhZ3s 

4/9: Still in deficit, but current account it better (than we expected). ‪#economicshaikus

3/9: ‪#Eurozone is crap, but Germany is growing. Lucky for those guys! ‪#economicshaikus

30/8: Eurozone crumbling, no recession due to mines. Australia rocks! ‪#economicshaikus